/*
* Conditions Of Use 
* 
* This software was developed by employees of the National Institute of
* Standards and Technology (NIST), an agency of the Federal Government.
* Pursuant to title 15 Untied States Code Section 105, works of NIST
* employees are not subject to copyright protection in the United States
* and are considered to be in the public domain.  As a result, a formal
* license is not needed to use the software.
* 
* This software is provided by NIST as a service and is expressly
* provided "AS IS."  NIST MAKES NO WARRANTY OF ANY KIND, EXPRESS, IMPLIED
* OR STATUTORY, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTY OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, NON-INFRINGEMENT
* AND DATA ACCURACY.  NIST does not warrant or make any representations
* regarding the use of the software or the results thereof, including but
* not limited to the correctness, accuracy, reliability or usefulness of
* the software.
* 
* Permission to use this software is contingent upon your acceptance
* of the terms of this agreement
*  
* .
* 
*/
package gov.nist.javax.sip.parser;

import gov.nist.javax.sip.header.*;
import gov.nist.core.*;
import java.text.ParseException;

/**
 * Parser for Priority header.
 *
 * @version 1.2 $Revision: 1.7 $ $Date: 2006/11/16 16:17:08 $
 *
 * @author Olivier Deruelle   <br/>
 * @author M. Ranganathan   <br/>
 *
 * 
 *
 * @version 1.0
 */
public class PriorityParser extends HeaderParser {

	/**
	 * Creates a new instance of PriorityParser 
	 * @param priority the header to parse 
	 */
	public PriorityParser(String priority) {
		super(priority);
	}

	/**
	 * Constructor
	 * @param lexer the lexer to use to parse the header
	 */
	protected PriorityParser(Lexer lexer) {
		super(lexer);
	}

	/**
	 * parse the String header
	 * @return SIPHeader (Priority object)
	 * @throws SIPParseException if the message does not respect the spec.
	 */
	public SIPHeader parse() throws ParseException {

		if (debug)
			dbg_enter("PriorityParser.parse");
		Priority priority = new Priority();
		try {
			headerName(TokenTypes.PRIORITY);

			priority.setHeaderName(SIPHeaderNames.PRIORITY);

			this.lexer.SPorHT();
			/*this.lexer.match(TokenTypes.ID);
			Token token = lexer.getNextToken();

			priority.setPriority(token.getTokenValue());
			*/
			// This is in violation of the RFC but 
			// let us be generous in what we accept.
			priority.setPriority(this.lexer.ttokenSafe());

			this.lexer.SPorHT();
			this.lexer.match('\n');

			return priority;
		} finally {
			if (debug)
				dbg_leave("PriorityParser.parse");
		}
	}

	
	public static void main(String args[]) throws ParseException {
	String p[] = {
	        "Priority: 8;a\n"
	        };
		
	for (int i = 0; i < p.length; i++ ) {
	    PriorityParser parser = 
		  new PriorityParser(p[i]);
	    Priority prio= (Priority) parser.parse();
	    System.out.println("encoded = " + prio.encode());
	}		
	}
	
}

